Arapahoe Ridge Weather Forecast

    • 55
    • 78

    Chance Rain Showers

    • 52
    • 67

    Rain Showers Likely

    • 54
    • 76

    Chance Rain Showers

    • 54
    • 82

    Partly Sunny

    • 56
    • 82

    Mostly Cloudy

    • 52
    • 79

    Chance Rain Showers

Today 23 Sep Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Mostly cloudy. Slight chance of Showers in the Morning, then a chance of Showers and slight chance of Thunderstorms in the afternoon. Highs in the mid 70s to lower 80s. Chance of rain 40 percent.

Tonight 23 Sep Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County

Slight chance of Thunderstorms in the evening. Mostly cloudy with a chance of Showers. Lows in the 50s. Chance of rain 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Arapahoe Ridge Temperature Statistics

September Temperature

Boulder Municipal Airport (1.9 miles)

  • Lowest 16 September, 2026

    51.8 °F

  • Average September

    71.6 °F

  • Highest 13 September, 2026

    96.8 °F

Climate (2021–2026)

Boulder Municipal Airport (1.9 miles)

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  • Average Low 2021–2026

    41.3 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    66.4 °F
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